XS Sight Big Dot Tritium Sight for S&W J Frame & Ruger SP101 (Fixed rear) Revolver- White

Features: Tritium powered front sight Big Dot front measures 0.188" Standard Dot front measures 0.140" High-contrast colored front sight Glow dot absorbs ambient light and glows in low light Durable CNC machined steel 10 Year Warranty 30 Day Satisfaction Guarantee